--- a/Framework/Radiography/RadiographyScene.cpp	Wed Nov 21 17:08:03 2018 +0100
+++ b/Framework/Radiography/RadiographyScene.cpp	Thu Nov 22 11:45:18 2018 +0100
@@ -443,6 +443,25 @@
     }
   }
 
+  void RadiographyScene::RemoveLayer(size_t layerIndex)
+  {
+    if (layerIndex > countLayers_)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+    delete layers_[layerIndex];
+    layers_.erase(layerIndex);
+    countLayers_--;
+  }
+
+  RadiographyLayer& RadiographyScene::GetLayer(size_t layerIndex)
+  {
+    if (layerIndex > countLayers_)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+    return *(layers_[layerIndex]);
+  }
 
   bool RadiographyScene::GetWindowing(float& center,
                                       float& width) const

--- a/Framework/Radiography/RadiographyScene.h	Wed Nov 21 17:08:03 2018 +0100
+++ b/Framework/Radiography/RadiographyScene.h	Thu Nov 22 11:45:18 2018 +0100
@@ -117,6 +117,15 @@
 
     RadiographyLayer& LoadDicomWebFrame(IWebService& web);
 
+    void RemoveLayer(size_t layerIndex);
+
+    size_t GetLayerCount()
+    {
+      return countLayers_;
+    }
+
+    RadiographyLayer& GetLayer(size_t layerIndex);
+
     Extent2D GetSceneExtent() const;
 
     void Render(Orthanc::ImageAccessor& buffer,